This demo appears to date from 2012:
<a href="https://plus.google.com/+NiklasvonHertzen/posts/Qo6T85W8sFQ" rel="nofollow">https://plus.google.com/+NiklasvonHertzen/posts/Qo6T85W8sFQ</a>
Be sure to read how it works: <a href="https://plus.google.com/+NiklasvonHertzen/posts/Qo6T85W8sFQ" rel="nofollow">https://plus.google.com/+NiklasvonHertzen/posts/Qo6T85W8sFQ</a><p>Very smart and creative solution.
Found myself reminded of a Chaos Computer Congress presentation.<p><a href="https://www.youtube.com/watch?v=v8F8BqSa-XY" rel="nofollow">https://www.youtube.com/watch?v=v8F8BqSa-XY</a>